<template>
    <div class="todo-header">
        <input type="text" placeholder="请输入你的任务名称，按回车键确认" v-model="title" @keyup.enter="add"/>
    </div>
</template>

<script>
    import {nanoid} from 'nanoid'
    export default{
        name:'MyHeader',
        data(){
            return {
                title:''
            }
        },
        methods:{
            add(){
                //校验输入
                if(!this.title.trim()){
                    alert("输入不能为空")
                    return
                }
                //通知Vue
                const todoObj = {id:nanoid(),title:this.title,done:false}
                console.log(todoObj)
                this.addTodo(todoObj)
                //清空输出
                this.title = ''
            }
        },
        props:['addTodo'],
    }
</script>

<style scoped>
    .todo-header input {
        width: 560px;
        height: 28px;
        font-size: 14px;
        border: 1px solid #ccc;
        border-radius: 4px;
        padding: 4px 7px;
    }

    .todo-header input:focus {
        outline: none;
        border-color: rgba(82,168,236,0.8);
        box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075) , 0 0 8px  rgba(82,168,236,0.6);
    }
</style>
